CLASS RACER FORUM - View Single Post - 2008-9 Impala 5.3

ss3011 · 03-04-2021, 05:26 PM

A special version of the 4L65 was built for Volvo , before Ford bought them . It had the highest sprocket ratio and Final Drive ratio . Also had the heat treated 4th clutch shaft . Those parts would be a good upgrade for drag racing , although you probably won't ever get into 4th gear . One thing for sure is to get some high torque half shafts . There may be aftermarket help for that .

03-04-2021, 05:26 PM	#15
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: 2008-9 Impala 5.3 A special version of the 4L65 was built for Volvo , before Ford bought them . It had the highest sprocket ratio and Final Drive ratio . Also had the heat treated 4th clutch shaft . Those parts would be a good upgrade for drag racing , although you probably won't ever get into 4th gear . One thing for sure is to get some high torque half shafts . There may be aftermarket help for that .